code: def tearDown(self):
      self.session.close()
  
file_path: magenta/magenta/models/rl_tuner/rl_tuner_test.py
imports: import os
  import os.path
  import tempfile
  from magenta.models.rl_tuner import note_rnn_loader
  from magenta.models.rl_tuner import rl_tuner
  import matplotlib
  import matplotlib.pyplot
  import tensorflow.compat.v1
label_desc: Use image node_id 2 for calling the RLTunerTest obj's underlying member method code with example usage: obj.tearDown() without return types